Prime Minister Narendra Modi on Wednesday, April 17, 2024, virtually observed the unique Surya Tilak ceremony at the newly constructed Ram Mandir in Ayodhya, Uttar Pradesh. Participating in prayers to Lord Ram from his residence, the Prime Minister witnessed the intricate event, which saw a precise beam of sunlight illuminate the forehead of the Ram Lalla idol. The observation coincided with the auspicious Hindu festival of Ram Navami, celebrating the birth of Lord Ram.

The Surya Tilak, a meticulously planned scientific marvel, represents a harmonious blend of ancient spiritual tradition and modern engineering. For approximately three to three-and-a-half minutes, starting around 12:16 PM IST, sunlight was guided by an opto-mechanical system to fall directly on the deity's forehead. This innovative arrangement ensured that the celestial event could occur annually without relying on electrical power or batteries, underscoring its sustainable design.

The ceremony holds significant religious importance, particularly on Ram Navami, a day when devotees traditionally offer prayers and celebrate the advent of Lord Ram. The direct illumination of the idol by the sun's rays is seen as a divine blessing and a fulfillment of traditional beliefs associated with the deity. The Prime Minister's virtual presence highlighted the national significance of the event, which was also widely viewed by millions of devotees across the country through live telecasts.

Key details regarding the Surya Tilak mechanism include:

  • System Development: The intricate opto-mechanical system was developed through a collaborative effort between the Central Building Research Institute (CSIR-CBRI) in Roorkee and the Indian Institute of Astrophysics (IIA) in Bengaluru.
  • Mechanism: It comprises a series of mirrors and lenses strategically placed within the temple structure. Sunlight, captured by a first mirror on the temple's top floor, is then directed through a system of three more mirrors and two lenses before reaching the Ram Lalla idol.
  • Precision Engineering: The system was engineered to compensate for the sun's changing position throughout the year, ensuring that the 'tilak' falls precisely at the designated time on Ram Navami each year.
  • Spot Size: The light beam forms a circular 'tilak' of approximately 75 millimetres (2.95 inches) in diameter on the idol's forehead.

The virtual observation by Prime Minister Modi from his residence underscored the widespread impact and attention the Ayodhya Ram Mandir has garnered since its inauguration on January 22, 2024. The temple continues to be a focal point for cultural and religious activities, drawing devotees and generating national interest. The successful execution of the Surya Tilak ceremony further solidifies the temple's unique position as a site where advanced scientific principles support ancient rituals. This annual event is anticipated to become a regular feature, continuing to draw pilgrims and observers eager to witness the phenomenon.